Fastener



FIG. 1 is a perspective view of front, bottom and left side of a fastener according to my new design;

FIG. 2 is a front view thereof, the rear view being a mirror image;

FIG. 3 is a right side view thereof, the left side view being a mirror image;

FIG. 4 is a top view thereof;

FIG. 5 is a bottom view thereof;

FIG. 6 is a cross-sectional view taken along line 6-6 in FIG. 4;

FIG. 7 is a cross-sectional view taken along line 7-7 in FIG. 4;

FIG. 8 is a cross-sectional view taken along line 8-8 in FIG. 2;

FIG. 9 is a cross-sectional view taken along line 9-9 in FIG. 2; and,

FIG. 10 is a view showing usage thereof.

The broken lines in FIGS. 1-9 represent portions of the article and form no part of the claimed design. The broken lines in FIG. 10 represent portions of the article as well as environmental structure, showing usage thereof, and form no part of the claimed design. The dash-dot lines represent boundaries between the claimed portion and unclaimed portion. 

CLAIM The ornamental design for a fastener, as shown and described. 